The present study aimed to investigate the protective effect of yeast against mycotoxicosis induced by Aspergillus parasiticus and Fusarium tricinctum as common fungal contaminants on albino rats. 60 albino rats were randomly divided into three experimental groups: (A, B and C), each contain 20 animals. Group A: rats were kept as a control group was feed on uncontaminated feed and drinking water without any treatments. Group B: animals were feed contaminated diet with aflatoxins in level of 0.5 mg/kg ration and diacetoxyscirpenol in level of 10mg/kg ration. Group C: animals were feed contaminated diet as in group B. mixed with Saccharomyces cerevisiae (2g/kg of feed) during the whole time of the experiment. At the end of 1st, 2nd, 3rd, and 4th month, respectively, five animals from each group were weighted and dissected. Tissue samples were obtained from liver, kidneys and intestine for histopathological examination by light and electron microscope. The rats showed reduction of body weight and weight gain in group B. Addition of yeast to contaminated diet in the group C improved this reduction. Histopathological and ultrastructural studies revealed pathological changes in liver and kidney in group B. administration of yeast improve the intensity and the prevalence of the lesions and enhances the immune response of the body against mycotoxicosis (Lymphocytes and plasma cells).

The present study aimed to investigate the protective effect of yeast against mycotoxicosis induced by Aspergillus parasiticus and Fusarium tricinctum as common fungal contaminants on albino rats. 60 albino rats were randomly divided into three experimental groups: (A, B and C), each contain 20 animals. Group A: rats were kept as a control group was feed on uncontaminated feed and drinking water without any treatments. Group B: animals were feed contaminated diet with aflatoxins in level of 0.5 mg/kg ration and diacetoxyscirpenol in level of 10mg/kg ration. Group C: animals were feed contaminated diet as in group B. mixed with Saccharomyces cerevisiae (2g/kg of feed) during the whole time of the experiment. At the end of 1st, 2nd, 3rd, and 4th month, respectively, five animals from each group were weighted and dissected. Tissue samples were obtained from liver, kidneys and intestine for histopathological examination by light and electron microscope. The rats showed reduction of body weight and weight gain in group B. Addition of yeast to contaminated diet in the group C improved this reduction. Histopathological and ultrastructural studies revealed pathological changes in liver and kidney in group B. administration of yeast improve the intensity and the prevalence of the lesions and enhances the immune response of the body against mycotoxicosis (Lymphocytes and plasma cells).

Fungal synthesis of kojic acid has gained more
interest in these days as an alternative way to
chemical synthetic. The aspect of the microbial
fermentation process is to develop a suitable culture
medium to obtain the maximum amount of kojic
acid using statistical methods. In this study; different
selected three isolates of Aspergillus flavus (No 1, 2
and 3) were screened for their ability to produced
kojic acid and the isolate No 3 was the highest kojic
acid producer one. The capability of A. flavus No 3
to produce kojic acid was improved using Plackett-
Burman design. From ten different agro-industrial
wastes cane molasses recorded the highest kojic acid
productivity with 2.24 g/l-1 day-1 and was the most
effective parameter plays a crucial role in Plackett-
Burman design. Maximum kojic acid production
(24.65 g/l) by A. flavus (No. 3) obtained under the
fermentation conditions: incubation temperature at
25oC, incubation time 9 days, pH 3, inoculum size
0.5%, shaking rate at 150 rpm and medium
constituents: Cane molasses 60 g/l, yeast extract
7 g/l, KH2PO4 2 g/l, ZnSO4·7H2O 100 μg/l and
MgSO4·7H2O 1 g/l with regression analysis (R2)
99.45% and 2.33-fold increase in comparison to the
production of the original level (10.6 g/l).

NULL

NULL

NULL

The present research was done to study the ability of cyanobacterial species for removing heavy metals from sewage. As well, to estimate the growth and some metabolites of Beta vulgaris irrigated with sewage treated by cyanobacterial species. The best removal results were obtained by Anabaena oryzae compared to the other studied cyanobacteria. Whereas, A. oryzae showed high removal efficiency for Cd2+ followed by Pb2+, Zn2+, Fe2+, Cu2+ and Mn2+ (88.5, 83.1, 68.8, 62.0, 55.2 and 42.4%, respectively). Irrigation of plants by untreated or treated sewage generally caused stimulation in the total proteins, proline, carbohydrates and ascorbic acid. B. vulgaris grown in soil irrigated with untreated sewage showed maximum catalase, peroxidase activity, H2O2 and lipid peroxidation compared to the other treatments. The heavy metals availability was relatively low in the plant irrigated with treated sewage by cyanobacterial species; so, the antioxidants requirement was low and hence the induction of antioxidants was lower compared to the plant irrigated with untreated sewage.

NULL

NULL

NULL